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To shift a funcion (or its graph) down "a" units, you subtract "a" from the function. For example, x squared gives you a certain graph; "x squared minus a" will give you the same graph, but shifted down "a" units. Similarly, you can shift a graph upwards "a" units, by adding "a" to the function.

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9y ago

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That would be f(x) - a

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8y ago
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Q: Is f(x) shifted downward a units?
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